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Medals!

i think like the 3rd answer

Idk

what is the cost of 1 pencil?

1$

what is the cost of 2 pencils?

2$

what is the cost of 57 pencils? (btw, the $ goes in front)

you get the cost by multiplying the cost of 1 item by the number of items, right?

$57

Im pretty sure the answer is the 3rd one

1.5y

x + 1.5y=21

Very good. And if we know that we have a total of 18 items, how do we write that?

x + y = 18

Can u help me with one more?

Excellent. For a medal of your own, how many pens and pencils?

18 and 21

No, 18 pens and 21 pencils doesn't add up to 18 items, does it?

31

2.2x - 2.6

Now what?

so 0.4x in the beginning

Thank you!